An AC surge protector (also known as a surge protection device or SPD) may frequently blow for several reasons, which can be related to design, installation, maintenance, and external environmental factors. Below are some common causes and explanations:1. Poor Quality of the Surge Protector Insufficient Voltage Rating: If the surge protector's rated voltage or maximum continuous operating voltage (UC) is lower than the actual system voltage or the highest possible fault voltage, it may be subjec

Composition of Composite InsulatorsComposite insulators (also known as synthetic insulators) are modern electrical insulation devices widely used in high-voltage transmission lines and substations. They combine the advantages of traditional porcelain and glass insulators while overcoming some of their limitations. A composite insulator primarily consists of the following components:1. Core Rod Material: Typically made from glass fiber-reinforced plastic (FRP, Fiber Reinforced Plastic), or someti

The criteria for replacing insulator strings on high-voltage towers is not solely based on the number of broken pieces nor determined by a single calculation. Instead, it involves a comprehensive consideration of multiple factors. Below are the main considerations that determine whether an insulator should be replaced: Physical Damage: If there is evident physical damage to the insulator, such as fractures, cracks, surface spalling, or skirt damage, then even if the predefined number of broken p

What is a Surge Arrester?Definition of Surge ArresterA surge arrester, also known as a lightning arrester, is a device used to protect electrical equipment from overvoltage transients caused by lightning or switching.Characteristics of zinc oxide arrester Circulation capacity Protective characteristic Sealing performance Mechanical property Antifouling property High operational reliability Power frequency toleranceSurge ProtectionSurge protection is essential to prevent damage to electrical syst